Edward b



UNITED STATES PATENT QFFICE.

EDWARD n. GIBFORD, on LITTLETON. NEW HAMPSHIRE. Assistme, ny MESNE ASSIGNMENTS, 'ro ADRIAN onnnnnnron ceras-ANY, or ADRIAN, Miei-Eraser,

.A CORPORATION 0F MICHIGAN.

CARB'URETER.

Application led January 31, 1914, Serial No. 815,725. Renewed July 2 1920,

To all whomz't may concer/n.'

Be it known that I, EDWARD B. Girono, a citizen of the United States of America, residing at Littleton, in the State of New Hampshire, have invented certain new and useful Improvements in Carbureters, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to carbureters and has reference, irst, to the means employed for effectively commingling the liquid fuel with the air, and further, for controlling the admission of the fuel to the mixing chamber by which the carbureter may be quickly and easily adapted for use with different grades of fuel, or under other varying conditions.

In the drawings:

Figure l is a central longitudinal section through the carburetor;

Fig. 2 is a cross section thereof;

Fig. 3 is a view similar to Fig. 1 showing a modified construction; and

Fig. 4 is an elevation thereof.

is a suitable casing containing a straightway air admission passage B having a bulbular enlargement C therein. This enlargement is preferably formed with oppositely-arranged obliquely-angling walls D and D `connected with a cylindrical wall D2, as shown in Fig. l. E is a valve or movable disk arranged within the bulbular enlargement and adapted to seat against the wall D. F is a stem connected to the valve E and having an operating connection to the stem G of a needle valve which controls the admission of the liquid fuel. The arrangement is such that the suction in the admission conduit will cause the valve B to move away from its seat and in so doing to actuate the stem G of the valve H, opening the liquid fuel passage. Specifically, the connection between the stems F and G is shown as formed by a lever I fulcrumed upon a post J projecting from the casing A. The liquid fuel passage controlled by the valve H connects with the bulbular chamber C,

preferably through the peripheral wall D2 thereof, and as specificallyV shown this passage K is formed in a lug L projecting from one side of the casing A, in which the needle valve H is also seated. As specifically shown, the stem G is parallel to the axis of the passage B, and passes through a suit- Speccation of Letters Patent.

atente d Feb.

U, i Serial No. 389,839.

able packing gland M into a longitudinallyeritending chamber N within the lug L. The valve H is preferably seated upon a detachable seat member located in the chamber N, while a spring P sleeved upon the stem bearing against a shoulder G thereon. to normally hold the valve E to seat. The liquid is admitted to the chamber N upon the opposite side of the seat member O, and when the valve is withdrawn from its seat will flow through restricted passage Q in said seat member andthroug'h the lateral passage Ii into the bulbuliar chamber C.

With the construction thus far described in operation, whenever in the passage B the pressure upon the dish valve E will move the latter from its seat and through the medium of the lever l. and stem G will withdraw the needle valve I-I. This will permit air to enter the bulbular chamber C around the periphery of the disl valve E, and sweeping rround this chamber, will be directed inward by the oblique wall D, thereby causing eddies. At Jthe same time liquid fuel entering through the passage K will be caught by the sweeping air current and by reason of the eddies produced will be thoroughly eommingled with the air. Thus careful tests have demonstrated that the admission into the bulbular enlargement at the peripheral wall thereof is more effective than the admission centrally of the chamber or in any other part of the air conduit. i

If the carbureter were always used with the same grade of liquid fuel it would only be necessary to properly proportion the restriction of the passage through the seat member O to obtain satisfactory results. However, as it is usual to employ varying grades of fuel, it is necessary to provide means of correspondingly varying the restriction in the oil inlet to produce the best results, and to this end I preferably provide a needle valve R seated upon the opposite end of the seat member O and passing into the chamber N through the opposite end of the lug L. This valve R may be actuated either manually, by a thumb-screw S, as shown in Fig. 1, or mechanically, as shown in Fig. 3. Vith the former construction the carbureter may be adjusted for the different grades of fuel, as, for instance, for gasolene suction is produced of the liquid fuel or l xsone. by merely turning the thumbu t, and. as shown in lfig. el, two conduits 'V vvv :'131! ii. .1

i and i l; Vthe dineient iades ol tuel may be connelkztcffl to the sain-V chamber lll. '.lhus, where desired, the carbure 'er may lirst be operated upon a lig1 grade ot iucl, such as gasolene, and after the engine is in full operation and properly "warmed up, adjustnient may be made Yfor operation with the kerosene er other heavier fuel.

The valve il may also be employed iler latiug the liow el liquid ilfuel under diiitions oi' engine load, and, as 5' and l, ll is the throttle valve air Y in the p ge lo, Whichis fworated by a lever d. and this lever has an trie connection lil" -with a collar X on the siem et the valve. "lhus when the throt tlc is open, it will Viecluinically Withdraw the needle valve l?. farther from its seat so a.' to lessen the restriction to the flow of the liquid iuel. in independent manual adjustment is alsa permitted hy forming the threaded engagement between the stein oi the valve il and the collar X, and arranging the thunib-sorcw Fi beyond said collar.

What l claim as my invention is,-

l ln a carbureter, a casing having a straightway passage and a bulbular enlargement therein, a liquid fuel 'passage con necting with the periphery oi' said bulbular enlargement, a dish arranged in the en trance end oit said bulbular enlargement, stein connected to said disk, a valve controlling said fuel passage having` a stem par allel to the stem ot said disk, and connecting means between said stems by iviich a movement ot said disk under the impact of the air will Withdraw said liquid-control.- ling valve Ytrein its seat.

2. In a carbureter, a casing having a straightway passage and a bulhular en largement, a lug proj eeting 'from the side oi said casing having a liquid fuel inlet passage connecting with the periphery of said bulbular enlargement, a chamber in said lug, a valve seat in said chamber, valves engagshou'n in ineen-ia ing the opposite ends of said seat controlling the lion* of liquid, and means operated by the flow ot air through said air passage :l'or operating one of said `Valves, and means for adjusting the other of said valvesto variably restrict the flow.

3. ln a Carlini-eter, a casing having a straightway passage therethrough and a hulbular enlargement, a lug proj eoting troni one side of said casing having a liquid fuel inlet connecting' With the periphery o said bulbular enlargement, a chamber extending longitudinally ot said lug, a if'alve seat in said chamber, axially alined valves engaging the opposite ends el said valve seat, means for manually adjusting one of said valves to variably restrict the flow of liquid to said passage, and means for automatiA cally operating the other ot said valves by the flow ci air through said air passage.

Ll. ln a carbureter, the combination with a casing having a. straightway air passage ivith a bulbular enlargement, a liquid fuel passage connecting with the periphery el said bulbular enlargement, of a valve for controlling said liquid passage automatically operated by the ilovv ol air in said air passage, connections for liquids ot diilerent gravity, and a second valve between said connections and said first valve for variahly restricting the liquid passage.

5. ln a carhureter, the combination with a casing having an air passage with a bulbular enlargement, a liquid fuel passage connecting with the periphery of' said bulbulai1 enlargement, ot a valve for controlling said liquid passage automatically operated by the lion oi" air in said air assage, a throttle. Vvalve in said air passage, and a second valve for restricting the iioiv ot liquid through said liquid fuel passage operated through said throttle valve.

ln testimony whereof l affix rny signature in presence of tivo Witnesses.

EDlVARD B. GEBFORD. llitnesses:

il?. B. ALEXANDER, BURTON L. HART..

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